Flue construction



Sept. 6, 1932. w. E. STARK FLUE CONSTRUCTION Filed Sept. 24. 1928 l 4 I I I l Wine [25f AT ORN EY6 chimney.

Patented Sept. 6, 1932 V UNITED STATES Artur wILLEr E. s'rn'nx, OF EAST CLEVELAND, onr nssrenonro THE BRYANT HEATER &

MANUFACTURING COMPANY, or CLEVELAND,'OHIQ, Aconronnrron or oi-rrof 1 BLUE CONSTRUCTION Application filed September 24, 1923. Serial no. 309,200.

This invention relates to boilers or water heaters particularly adapted for use in connection with the heating system of a building or the like, and more particularly has to do 5; with a new and improved flue construction. f In the ordinary type of gas heater or gas boiler provision is madeby means of a draft hood for the passage of the products of combustion from the interior of the boiler to the The draft hood ordinarily being of rather large construction and being disposed on the top of the boiler thereby takes up considerable head room. V 1 It is, therefore, one of the improved features of the present invention-to provide a fine construction, to take the place of the draft hood referred to, which is embodied in the construction of the boiler itself being dis- -posed within the outer casing so as not tobe visible from the outside thereby materially improving the appearance of the gas boiler.

A-further object of the invention is to provide a fine construction embodying the invention which is inexpensive to manufacture, neat in appearance, and exceptionally efficient in operation. 7

With the objects above indicated and other objects hereinafter explained in view the 1nvention consists in the construction and combination of elements hereinafter described and claimed.

Referring to the drawing:

Figure 1 is a fragmentary vertical sectional view of the upper port-ion of a boiler or water heater embodying the present invention.

' Fig. 2 is a top plan view of the boiler illustrated in Fig. 1 but with the cover'plate ,removed to more clearly showthe invention.

employed in the flue construction embodying the present invention.

In the drawing I have illustrated the upper portion of a gas boiler or water heater ofthe usual construction, embodying side walls 10, a front wall 11, and a rear wall 12, comprising a heat insulated casing for the boiler. A plurality ofcast iron water sections 13, four 7 of which are here shown, are-arranged side by side and supported on a suitable base not structed so as to admit air from the boiler :materially, improve the appearance of the gas -at 17-. The-opposite end of the flue top 15 is provided with a depending flange 18 which hasbolted or otherwise secured thereto a plurality of supporting arms 19, the lower endsofj which rest upon the upper surfaces Fig. 3 is a perspective vlew of the baffle shown. These water sections 18 are suitably connected together at the top byan outlet manifold 1 1 while the lower portions of the watersections and at therear are connected together in the usual manner by-an inlet manifold not shown. Directly beneath the water sections 13 and not here shown,'are gas burners adapted to heat the water. sections. The products: of combustion from the gas burners pass upwardly between the adjacent sides of the sections 13 and ordinarily pass off through the draft hood mounted upon the top of the boiler which communicates with the chimney. The draft hood is usually con room to thereby break the intensity of the draft'produced'by the chimney and also for the purpose ofdiverting back drafts. This construction, however, requires considerable overhead room and does not present a very pleasing appearance.

It is the purpose of the present invention to provide a flue construction which is contained within the boiler casing to thereby boiler and at the same time eliminate the necessity for any appreciable amount of head room in connection with'the installation of the boiler. i H

A cast ironfiue top 15 extends substantially horizontally above thewater sections 13 and has one end turned downwardly to 1 provide a flange 16 which is supported upon the top of the water sections-13 as indicated creased as desired. This flanged opening 20 is adapted to communicate with the chimney by suitable pipes not shown, to thereby carry off the products of combustion from within the boiler.

Directly beneath the forward portion of the flanged opening, 20 is a depending bafie 21 provided with an annularly extending flange 22, the upper surface of which is adapted to: engage with the undersurface of I the flue top" adjacent the-forwardportion of the flanged opening 20. This baffle 21 is provided with laterally extending" ears or" projections 23 integral withthe outer surface of the flange 22 and the ears 23 are bolted or otherwise secured as at 2a to' the hue top 15. The-baffle 21 extends dbwnwaard Ly and rearwardly'coverinrgi a portion of the fi'amg'ed opening and extends rearward'ly far enough to prevent the back drafts from passing from the chimney into the combusti'on: chamber of the boiler. r

a 'As; previously stated, the sections: 13 are, connected together and provided upon their upper surfaces with abutting transversely extending lateral flanges 1311'. These flanges converge toward the center of the boiler and terminate short thereoifto provide openings 136 These flanges: 13a: tend to direct or divert the products of combustion in their upward travel toward the openings- 136 throughwhioh they pass to thev chimney;

It is to be noted that the rearward edge of the baflle 21 also extendsslightly' beyond the forward edge of the rear flanges: 113a and as a result the back drafts coming down: the forward ortion ofthe chimney engage the baffle and: are: diverted somewhat laterally through the opening 27. The back dratts whioh' pass. downwardly at the rear: portion of thechimney through: the flanged: opening '26 engage the upper surface of the rear flanges 13a and are similarly" diverted and pass through the opening 27 in the reanof flhhbusihg. It will, therefore; be readily seenthatth'e' arrangement? of: thesegpant'soooperates to prevent any back drafts from passing; through the openings 1 3?) intothe combustion chamber.-

v The housing is-provid'e'd wi'th is usual insulated cover plate 25: and has a transverse opening 26' concentrically located with respeet tothe' flanged openingg20 and o f?sli ht- 1y larger diameter, The rear wall 12: is i also i provided with: a transverse opening adjacent the opening 26 inthe cover plate 25- and is in communication with the boiler noom or tlle surrounding-atmosphere tothereby admit air under normal conditionsfor i thepurpose of breaking the intensity of the draft produced by the chimney,

It will be noted thatf this: flue construction incorporates the essential functions of the ordinarydraft hood; namely, to admit airinto the'chimney from theboi'ler room=to from the combustion chamber.

break the intensity of the draft produced by the chimney, and also to provide a baflie for the purpose of diverting backv drafts away The products of combustion passing upwardly between the -water sections 13 are drawn past the lower end of the baffle 21 and up through the flanged opening 20 due to the draft produced by the chimney. At the same time air isv drawn in through the opening 27 inthe rear wall 12; and thereby tends tobreak the intensity of the draft produced by the chimney. At the same time" any back drafts within the chimney engage With the baflle 21 and are diverted causing them to pass outwardly through the u opening 27 in theirear wall 12- and into the surrounding atmosphere thereby preventing them: from entering the combustion chamber. It is'therefore noted that the products of com-- busti-on' in passing upwardly between the 1 water sections 13 are; compelled to change their direction of flow in passing into the chimney from a" vertical direction toa horizontal direction. I

VVhrle I have described the preferredzembodiment of the invention it is to be un-derstood that I am not to be limited thereto as changes and modificationsmay be made without departing from the spirit'of the-invention onlyof said openingiwhereby the back drafts from the chimney are diverted away from the ombustion: chamber: of th boiler; and

an enclosin member" having an: opening in one wall: thi o'ugh which backdrafts are air-lapxted to passto atmosphere:v .7 v

2. In combination with aboiler ha ving water sections and ahousing: enclosing'ithe same;-a fluedisposed withinsaid housing'comprising a member-supported by said sections,

- an opening: in said member adaptedto communicate with a chimney, a back draft defl'e'c'tor" disposed beneath a portion ofsaid opening, and means for admitting-air into the boi'leradjaeent said opening whereby the intensity of the draft produced by thechim-* Hep i's' redueed'; v 3. A boiler of the chaoa'cter describedeomrising a plurality of water' section'shaving cooperating lat rally extending flanges upon the upper portions-thereof, said cooperating flanges bein out away to i provide" openings through: whichythe products of combustion passga member'supported by the flariges ofsaid=seotions and'having an o ening: theremg; and= means associated: with said member adjacent said opening and extending rearwardly to adjacent the forward edges of the rear flanges of said sections whereby back drafts from the chimney are diverted away from the combustion chamber of said boiler.

4. In a boiler of the character described, a plurality of water sections having laterally extending cooperating flanges at the upper portions thereof and extending forwardly at an incline, said cooperating flanges being;

cut away to provide openings through which the products of combustion may pass, a member supported by said boiler sections and having an opening through which productsof combustion may pass, and a baffle asso-- ci ated with said member adjacent the forward portion of said opening, said bafile extending rearwardly at an angle and substantially overlapping the forward edges of said flanges and adjacent the rear portions of said openings.

In testimony whereof, I hereunto affix my signature.

WILLET E. STARK. 

